Caterpillar says its fourth-quarter profit jumped 60 percent, boosted by a steep increase in global demand for its products.  The world's largest maker of construction and mining equipment also issued 2012 guidance above Wall Street predictions.  The company is reporting net income of $1.55 billion, or $2.32 per share, up from $968 million, or $1.47 per share, in the same quarter last year.  Sales and revenue jumped 24 percent to $17.24, and Caterpillar expects a 2012 profit of $9.25 per share and $68 billion to $72 billion in revenue.